Back-rest arrangement for chairs



Ndv. 25, 1930. 1', D 1,782,398 I BACK REST ARRANGEMENT FOR CHAIRS FiledJune 13, 1928 1c seet W t t 'Iiheebp've meptie ied .ebject of theiii'vention, as Well es/ dhere togetheriwiththe nalny Teiems PatentedNov. '25, 1930 hpmwps); OEPRKQJDGIQ-ILLINOIS; Assieiqoit To w mm s. minms, new cm nm Aepo RE GTE-[A113 QOMPANY,-QE ELKHABTQ i DIANA" iBAQERESTA RM EMEM iron CHAIRS L '1 pp i atipn fil d M1 back rest'arahgementl for chairs and it 0011'- siste of thehei'einaftei'rdescribed and more particularl mint d put in t p ndedel tm i tweenthehtck; rest lpesteiid sje'atef a chair iOli relativeto said et ed wreperg ii advalitagesttheiieef williiiore fully occur as l, pnoeeed'with Iiiy specification t i In {the awi g 1 s-ev1e W 1n sideelevetionlof a chair is adetailk jiew (if e'fmgnient 6f. the

tiiineyelbolt is connected thereto;

H ther typeofpheirS Where the; peculiar cha-reicteristics make. it i ofad ntage to d qso.

wliefe n g.;n wa f de a l ht i mbe i new the-inven ion:inven d in t ittion hyl p q tom-x :ii t rmed etet p drs compee n l i lmw n f Jth e r hih is we isnbt te t a y k I of metalit nclud sfia .j d tc mi si iilumtyte ttubu l sfifi yt e, t p j nds e M4625 n pectiv y- The b tto nds. i

the. leg are bent out ard yft p efth Spta knecs fiyJiQ Stab lity andthew' tremities; thereof carry ca s tere pr dp ee '6 upon which thechair may be readily i iqved em tyin m m re edfbackeest arrangement-@1928. ser a h. 284,966."

the tepend Of said base or standardend having suitable rotativebearingasr well es vert cel ad ustment With 1 reference to {said atitstop and apair (if ifeanwardlylextending ppe r,

9 indicates-a e efwhqlethe seatfr aine of the of frojnt andsi'e artmembers 10 land 11 respectively and side members 12, z ll'of angle/barstock with the vertical flanges facing? upwardly "from the horizontal;flenge-which faces inwardly. Connecting the mid portipiis of said frontand rear members of the Seat frame is a metallic plate- 130f aqwidthless than that of seid seatfi ame. :Said pl ete in3 1 el s a hc c ta lyp ed mid per i n andfront and rear p0rti nsi-15 and 16respec tively. -"Said front and rear portiengere inciined upwardly in pppsite directions:and at slightly different a nglestand'a the lneigiiisthereof-engage;against the unde glide ef jthe Ql O i lflariges of theseat irame members Miami 11 and are securedthetetq es g fo r instancebyispet elding. Inthe eer pq 'tien f t e Pl t way b w ntit ideed s is Prvid ide met d p t on 1 hav ng 5 2 enin 1 8 h e nt el pa t of Sa d mid tpor tioi l of thefseat frame pleteengages u ownd s fix d t9- t erfl ng -ipft sleeve 8. By reason of the incli o o t e plate po ti 5 l5 1 and 16respectii ely,- the, .seat' fra e ,ie lpitched or tiltedfloimyqztidljtoward theigearalnd esseciated withwthe seat; frame me tioiled is eseatlcuship 1" member'lQ se -fitting. Within the upright flanges of theseet fii gmelmemdesired. i t t t i r -20, d e -e a whel ath-re t upering pe t he b tto n 2 'O w th e i b n n eigene l c v it t t x remi ym y teti e ym eetetithe teem t" I t :be dositiqned between the earsSFpnthe sleeve 90 here as to be removable therefljg n whert s0 hand wheel24c. This sleeve which is interiorly threaded has opposed shoulders611-- gaging opposite sides of said post portion so that while it may berotated or turned therein, it cannot be moved endwise therefrom in amanner permitting its withdrawal. 7

25 indicates a bolt or screw, the top end of which is made in the formof an eye 26. Said bolt passes down through the opening 18 in thedepressed portion 17 of the seat plate part 16 and a pin 27 which isseated on said depressed portion, with its ends extending under portionsof said plate part at each side of said depression, passes through saideye so that the belt or screw may swing thereon. With this arrangement,the pin preferably has a driven fit at its ends under said plateportions, so that it cannot be easily displaced therefrom. The screw orbolt 25 has threaded engagement with the sleeve 23 of the handwheel 25and normally its bottom end extends beyond the handwheel and may have across pin 28 which prevents disengagement of said screw from said sleeveand handwheel.

The top end of the back rest post is substantially straight and to saidend is adjustably secured in any suitable manner a back rest member 29.As said back rest member forms no particular part of the presentinvention, it need not be described in further detail.

When it is desired to adjust the in or out position of the back rest,with reference to the seat, the handwheel is turned in the properdirection. Thus the sleeve 23 will climb up or down on the screw or bolt25 which turns on the pin 27, to swing the post about its pivot with theears 8 on the sleeve 8. In this manner the back rest is swung forwardlyand rearwardly. By reason of the screw threaded engagement between thehandwheel sleeve and screw or bolt, the back rest remains'in theadjusted position without the necessity of extra locking means.

The. number of parts employed are indeed few and may be readilyassembled so that the cost of manufacturing the arrangement described ismaterially reduced and said parts are so correlated as to operateefficiently for the intended purpose.

While in describing the invention, I have referred in detail to theform, arrangement and construction of the various parts thereof, I donot wish to be limited thereto except as may be specifically pointed outin the appended claims.

I claim as my invention 1. A chair embodying therein, a seat frameincluding a plate and a seat frame post to which said plate is secured,a back rest post pivoted at one end with respect to said seat frame, athreaded member pivoted to said seat frame plate for a swinging movementabout an axis parallelwith that of the back rest post, a hand wheelhaving a sleeve rotatively mounted with respect to said post and havingoperative engagement with said threaded member. 7

2. A chair embodying therein, a seat frame including a plate, a seatframe supporting post, a sleeve connecting said post and plate andhaving at least one car on the rear side thereof, a back rest postpivoted at one end to said car, a threaded member pivoted at one endwith respect to the seat frame about an axis parallel with that of theback rest post and a hand wheel turnable with respect to said backrestipost and engaged with said threaded member.

3. A chair embodying therein, a seat frame including a plate, a seatframe supporting post, a sleeve connecting said post and plate andhaving at least one ear on the rear side thereof, a back rest postpivoted at one end to said car, a pin carried by said seat frame plateand arranged parallel with the axis of the back rest post. a threadedmember swingable on said pin, and a hand wheelturnable with respect tosaid post and engaged with said threaded member.

4.. A chair embodying therein, a seat frame including a plate, a seatframe supporting post, a sleeve connectingsaid post and plate and havingat least one car at the rear thereof, said plate having a depressedportion therein, a seat post pivoted at one end to said ear, a pindisposed in said depressed portion of said plate, 'a threaded memberhaving an eye swingable on the pin, and a hand wheel journalled in theback rest post and engaged on said threaded member.

'5.A chair embodying therein a seat, a supporting member therefor, meansproviding a back rest support, a pivotal connection between saidsupporting member and said means, a shaft arranged in said supportingmember parallel with said pivotal connection, a screw threaded memberoperatively connected to said shaft so as to swing about the axisthereof, and a member secured in a part of said back rest supportproviding means and having an opening therein in which said screwthreaded member has a screw threaded engagement for causing movement ofsaid backrest support providing means about said pivotal connection.

6. A chair embodying therein a seat, a supporting member therefor, meansprovid ing a back rest support, a pivotal connection between saidsupporting member andsaid means, a shaft arranged in said supporting 129member parallel with said pivotal connection, a screw threaded memberoperatively connected to said shaft so as to swing about the axisthereof, and a member secured in a part of said back rest supportproviding means. in a manner permitting a turning movement therein andwith which said screw threaded member has a threaded engagement.

7. A chair embodying therein a seat, a

a providing means about said pivotal connec tion.;

supporting member therefor including a pair of laterallyfspaced,rearwardly extend- "fling portions, means providing a. backrest Vsupport, a portionoiwhich is disposed be tween and has ffa pivotal'connection with said laterally spaced, rearwardly extending portions ofsaid supporting member, a shaft arrangedinsaid supporting: memberparallelwith said pivotal connection, a screw 1 threaded memberoperatively connected to" said shaft so as to'swing about the axisthereof and an element secure'din said, back rest 1 support providingmeansand havinga screw g threaded opening therein in which said screwthreaded member is engaged for causing movement of said back restsupport In testimony whereof, I have hereunto set my hand,this 9th dayofJune, 1928. TQRRIS ALFREDS

